| 1 | // RUN: %clang_builtins %s %librt -o %t && %run %t |
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| 2 | // REQUIRES: librt_has_floatdisf |
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| 3 | |
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| 4 | #include "int_lib.h" |
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| 5 | #include <float.h> |
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| 6 | #include <stdio.h> |
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| 7 | |
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| 8 | // Returns: convert a to a float, rounding toward even. |
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| 9 | |
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| 10 | // Assumption: float is a IEEE 32 bit floating point type |
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| 11 | // di_int is a 64 bit integral type |
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| 12 | |
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| 13 | // seee eeee emmm mmmm mmmm mmmm mmmm mmmm |
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| 14 | |
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| 15 | COMPILER_RT_ABI float __floatdisf(di_int a); |
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| 16 | |
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| 17 | int test__floatdisf(di_int a, float expected) |
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| 18 | { |
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| 19 | float x = __floatdisf(a); |
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| 20 | if (x != expected) |
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| 21 | printf(format: "error in __floatdisf(%llX) = %a, expected %a\n" , |
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| 22 | a, x, expected); |
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| 23 | return x != expected; |
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| 24 | } |
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| 25 | |
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| 26 | char assumption_1[sizeof(di_int) == 2*sizeof(si_int)] = {0}; |
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| 27 | char assumption_2[sizeof(di_int)*CHAR_BIT == 64] = {0}; |
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| 28 | char assumption_3[sizeof(float)*CHAR_BIT == 32] = {0}; |
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| 29 | |
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| 30 | int main() |
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| 31 | { |
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| 32 | if (test__floatdisf(a: 0, expected: 0.0F)) |
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| 33 | return 1; |
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| 34 | |
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| 35 | if (test__floatdisf(a: 1, expected: 1.0F)) |
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| 36 | return 1; |
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| 37 | if (test__floatdisf(a: 2, expected: 2.0F)) |
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| 38 | return 1; |
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| 39 | if (test__floatdisf(a: -1, expected: -1.0F)) |
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| 40 | return 1; |
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| 41 | if (test__floatdisf(a: -2, expected: -2.0F)) |
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| 42 | return 1; |
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| 43 | |
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| 44 | if (test__floatdisf(a: 0x7FFFFF8000000000LL, expected: 0x1.FFFFFEp+62F)) |
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| 45 | return 1; |
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| 46 | if (test__floatdisf(a: 0x7FFFFF0000000000LL, expected: 0x1.FFFFFCp+62F)) |
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| 47 | return 1; |
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| 48 | |
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| 49 | if (test__floatdisf(a: 0x8000008000000000LL, expected: -0x1.FFFFFEp+62F)) |
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| 50 | return 1; |
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| 51 | if (test__floatdisf(a: 0x8000010000000000LL, expected: -0x1.FFFFFCp+62F)) |
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| 52 | return 1; |
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| 53 | |
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| 54 | if (test__floatdisf(a: 0x8000000000000000LL, expected: -0x1.000000p+63F)) |
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| 55 | return 1; |
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| 56 | if (test__floatdisf(a: 0x8000000000000001LL, expected: -0x1.000000p+63F)) |
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| 57 | return 1; |
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| 58 | |
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| 59 | if (test__floatdisf(a: 0x0007FB72E8000000LL, expected: 0x1.FEDCBAp+50F)) |
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| 60 | return 1; |
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| 61 | |
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| 62 | if (test__floatdisf(a: 0x0007FB72EA000000LL, expected: 0x1.FEDCBAp+50F)) |
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| 63 | return 1; |
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| 64 | if (test__floatdisf(a: 0x0007FB72EB000000LL, expected: 0x1.FEDCBAp+50F)) |
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| 65 | return 1; |
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| 66 | if (test__floatdisf(a: 0x0007FB72EBFFFFFFLL, expected: 0x1.FEDCBAp+50F)) |
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| 67 | return 1; |
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| 68 | if (test__floatdisf(a: 0x0007FB72EC000000LL, expected: 0x1.FEDCBCp+50F)) |
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| 69 | return 1; |
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| 70 | if (test__floatdisf(a: 0x0007FB72E8000001LL, expected: 0x1.FEDCBAp+50F)) |
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| 71 | return 1; |
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| 72 | |
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| 73 | if (test__floatdisf(a: 0x0007FB72E6000000LL, expected: 0x1.FEDCBAp+50F)) |
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| 74 | return 1; |
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| 75 | if (test__floatdisf(a: 0x0007FB72E7000000LL, expected: 0x1.FEDCBAp+50F)) |
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| 76 | return 1; |
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| 77 | if (test__floatdisf(a: 0x0007FB72E7FFFFFFLL, expected: 0x1.FEDCBAp+50F)) |
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| 78 | return 1; |
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| 79 | if (test__floatdisf(a: 0x0007FB72E4000001LL, expected: 0x1.FEDCBAp+50F)) |
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| 80 | return 1; |
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| 81 | if (test__floatdisf(a: 0x0007FB72E4000000LL, expected: 0x1.FEDCB8p+50F)) |
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| 82 | return 1; |
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| 83 | |
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| 84 | return 0; |
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| 85 | } |
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| 86 | |
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